Fig. 1

Example of registered T2, T1 and T1 with gadolinium (T1-gd) to the planning CT (pCT) with the pancreatic tail (orange) and spleen (blue) delineated. Interfraction motion is defined as positional changes between pCT and T2, whereas intrafraction motion is defined as positional changes between T2 and T1/T1-gd